Pink is the new black in terms of car theft prevention systems it seems, with one study showing that car thieves tend to give cars painted pink a very wide berth:
From 2004-2008, the most commonly colored vehicle stolen was black. This may be because black vehicles look more luxurious. Following close behind black were gray/silver automobiles. Of the 109 pink cars in the study, not one was stolen. A bright and uncommon color, like pink, may be as effective deterrent as an expensive security system.